# CVE-2023-28379: Memory corruption in Cesium NET

> A memory corruption flaw in the uC-HTTP library allows remote attackers to execute arbitrary code via a specially crafted network packet.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Nov 2023
- **Updated:** 4 Nov 2025
- **Also known as:** GHSA-r3hj-9x99-gmrh

## What is CVE-2023-28379?

CVE-2023-28379 is a critical memory corruption vulnerability in Silicon Labs Cesium NET, published on 14 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A memory corruption vulnerability exists in the HTTP Server form boundary functionality of Weston Embedded uC-HTTP v3.01.01. A specially crafted network packet can lead to code execution. An attacker can send a malicious packet to trigger this vulnerability.

Weakness: CWE-787 (Out-of-bounds Write), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2023-28379?

It affects 3 products.


Products: Silabs Gecko Software Development Kit, Weston-Embedded Cesium Net, Weston-Embedded Uc-Http.

## How do I fix CVE-2023-28379?

No fix has been published for CVE-2023-28379 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-28379 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-28379 exists.

## Other vulnerabilities in Silicon Labs Cesium NET

- [CVE-2023-45318](https://insights.sbomify.com/CVE-2023-45318/): Memory corruption in Gecko Platform (critical 10.0)
- [CVE-2023-2686](https://insights.sbomify.com/CVE-2023-2686/): Memory corruption in Gecko Platform (critical 9.8)
- [CVE-2023-4280](https://insights.sbomify.com/CVE-2023-4280/): Unvalidated input in Silicon Labs TrustZone implementation leads to accessing Trusted memory region (critical 9.3)
- [CVE-2023-4020](https://insights.sbomify.com/CVE-2023-4020/): Unvalidated input in Silicon Labs PSA Attestation service leads to secure memory access from non-secure memory (critical 9.0)
- [CVE-2023-25181](https://insights.sbomify.com/CVE-2023-25181/): Memory corruption in Cesium NET (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-28379 and fix it if it is affected.

What it is: CVE-2023-28379 is a critical memory corruption vulnerability in Silicon Labs Cesium NET, published on 14 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-28379 exists.

Affected product: Silicon Labs Cesium NET. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-28379/ (Markdown: https://insights.sbomify.com/CVE-2023-28379/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-28379
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-28379
- OSV: https://osv.dev/vulnerability/CVE-2023-28379

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-28379/
Summaries are generated and may contain mistakes; the official description above is the record.